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LXI Conformance

By Jochen Wolle, Rohde & Schwarz

Before a product is certified as LXI-conformant, it must be tested by a certified third party (an LXI Test House) to ensure that it conforms to the LXI specification. Test engineers are assured that combinations of LXI products will integrate well together, and that there is a consistent user experience between products. This is a key advantage of the LXI Conformance Specifications, and the LXI conformance process is unique among standards organizations.

The LXI Conformance Specifications are designed to ensure that the “interoperability” goal of the LXI Consortium is met to the fullest extent possible, while still allowing vendors to bring devices to market with the minimum of overhead in both time and cost.

Why is certification necessary?
Interoperability. Plain and simple. The LXI Consortium was formed in part to drive assurance that all LXI devices could work seamlessly together, creating an open standard environment and driving a consistent user experience.
Certification allows the usage of the LXI Logo on your device and in your promotional material. Certifying a product as LXI-conformant assures your product is interoperable and participates in an open standard environment. Being part of the LXI Consortium opens the door to more information on conformance, the standard, and it allows you to participate and collaborate with more than 50 of the top Test and Measurement industry leaders.



IVI Web Forum Question and Answer:
How to write/read custom commands?

Answered by Kirk Fertitta, Pacific Mindworks
for the
IVI Web Forum

Note:  Offering an IVI driver is a requirement for all LXI-conformant instruments, something you will find in the LXI Device Specification 2016, Section 6.1. The IVI Web Forum is hosted by the IVI Foundation.It was created to answer the more practical questions that arise when using the IVI Drivers to program test systems. To see a list of the IVI Drivers, click here. To view this question/answer in the Forum, click here.


what can i do if i want to execute a command which is not included in the class-driver and also not in the specific driver?
Is there a write/read/query-function included in all specific drivers?
Or do i have to create a third handle with viopen to viPrintf my custom scpi-commands?

Great question. The answer is "maybe". The new IVI-2014 Generation standard actually requires there be a standardized "pass-through" (aka "Direct I/O") interface in every IVI driver. Any driver with an *initial* release date on or after Jan 1st, 2015 must comply with IVI-2014. So, while most drivers you find out there were initially released before that date, the requirement of a DirectIO interface was actually just codifying practices that had been in place for years. For instance, Agilent and Keysight drivers almost certainly have a DirectIO interface. Most drivers our company has done for other major vendors include such an interface.

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LXI Conformance Test Suite 3.0

By Peter Plazotta, TSEP

The LXI Conformance Test Suite is now upgraded to Revision 3.0, which includes some of the following improvements:

  • New operating systems are supported (Windows 7 or Windows 10).
  • Easier installation.
  • Easier execution of 1588 tests.
  • Better documentation of the software and hardware requirements.
  • Performs conformance testing for the LXI Device Specification, revs. 1.4 or 1.5.

The LXI Conformance Test Suite has been brought up to speed and packaged into an installer for all LXI members to download from the LXI website. Members can download the LXI Conformance Test Suite 3.0 from the LXI Conformance page. (If you are not yet a member, then you are directed to the How to Join page.) Obtaining the LXI Conformance Test Suite from this location will ensure that your LXI Conformance tests are done with the correct released version of the specifications.


Thanks to all our readers.
Bob Helsel, Editor

Use the connection you already know!

New LXI Products

The LXI Consortium has certified more than 3653 instruments in over 309 product families since the specifications were first released in September 2005. Some of the recent LXI product introductions are highlighted below:

Pickering’s New 2-slot USB/LXI modular chassis - model 60-104
This 2–slot USB/LXI modular chassis offers a small lightweight form factor, making it ideal for portable, benchtop, and space restrictive applications. The chassis is designed for desk or rack mounting and features remote control via USB or LXI Ethernet. 

R&S®NGE100 Power Supply Series
The R&S®NGE100 power supply series consists of robust, high-performance, affordable instruments.
-R&S®NGE102 with two, or -R&S®NGE103 with three channels

Keysight N6705C DC Power Analyzer, Modular, 600 W, 4 Slots
4-slot mainframe holds up to 600 W of total power and up to 4 modules. More than 30 DC power modules to choose from (modules ordered separately)

Chroma High Power DC Electronic Load Model 63200A series

  • Rated power:3kW, 4kW, 5kW, 6kW, 12kW, 18kW, 24kW, Max. 240kW (Parallel)
  • Voltage range: 150V, 600V, 1200V
  • Current range: 2,000A max. per unit
  • CC, CR, CV & CP operation modes
  • CR+CC, CR+CV, CC+CV complex modes

CHYNG HONG ELECTRONIC Co. Ltd. DSPWr Series Power Supplies
Wide Range Programmable DC Power Supply(CV , CC , CP)
Wide range output, programmable voltage, current and power.
- 3U height, output voltage from 0~80V up to 0~1500V, output current from 0~30A up to 0~540A.

Good Will Instrument GSP-93xx Spectrum Analyzers
GSP-9300 is a light, compact and high C/P ratio 3GHz spectrum analyzer. The GSP-9300 frequency range stretches from 9kHz to 3GHz and features many functions such as radio frequency and power measurement, 2FSK digital communications analysis, EMC pretest, and active component P1 dB point measurement.

Tektronix TBS2xxx Oscilloscopes
With a 9-inch WVGA display, 20 million point record length and 1 GS/s sample rate, TBS2000 Series Oscilloscopes capture and display significantly more signal to help you evaluate designs faster.


LXI Consortium Publishes the
LXI Device Specification 2016

The LXI Device Specification 2016, Revision 1.5 can now be downloaded from the LXI website. 

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